Alexeyisaurus
Encyclopedia
Alexeyisaurus is an extinct genus
of elasmosaurid plesiosaur
known from the upper Triassic
(lower-middle Norian
age) of Wilczek Formation, Wilczek Land
, of Franz Josef Land
, Russia
. It was first named by A. G. Sennikov and M. S. Arkhangelsky in 2010
and the type species is Alexeyisaurus karnoushenkoi.
Genus
In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...
of elasmosaurid plesiosaur
Plesiosaur
Plesiosauroidea is an extinct clade of carnivorous plesiosaur marine reptiles. Plesiosauroids, are known from the Jurassic and Cretaceous Periods...
known from the upper Triassic
Triassic
The Triassic is a geologic period and system that extends from about 250 to 200 Mya . As the first period of the Mesozoic Era, the Triassic follows the Permian and is followed by the Jurassic. Both the start and end of the Triassic are marked by major extinction events...
(lower-middle Norian
Norian
The Norian is a division of the Triassic geological period. It has the rank of an age or stage . The Norian lasted from 216.5 ± 2.0 to 203.6 ± 1.5 million years ago. It was preceded by the Carnian and succeeded by the Rhaetian.-Stratigraphic definitions:The Norian was named after the Noric Alps in...
age) of Wilczek Formation, Wilczek Land
Wilczek Land
Wilczek Land , is a large-sized island located at . It is a part of Franz Josef Land, Russia.Wilczek Land is the second largest island of the Franz Josef Archipelago. It is almost completely glaciarized except for two narrow areas along its western shores. The highest point on the island is 606...
, of Franz Josef Land
Franz Josef Land
Franz Josef Land, Franz Joseph Land, or Francis Joseph's Land is an archipelago located in the far north of Russia. It is found in the Arctic Ocean north of Novaya Zemlya and east of Svalbard, and is administered by Arkhangelsk Oblast. Franz Josef Land consists of 191 ice-covered islands with a...
, Russia
Russia
Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...
. It was first named by A. G. Sennikov and M. S. Arkhangelsky in 2010
2010 in paleontology
-Anomalocaridids:-Newly named crustaceans:-Newly named insects:* A new family, Cascopleciidae, is published by Poinar Jr.* A new family of ceraphronoid Hymenopters, Radiophronidae, is published by Ortega-Blanco, Rasnitsyn, and Delclòs....
and the type species is Alexeyisaurus karnoushenkoi.